Membrane and Water Treatment

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Chemical cleaning of fouled polyethersulphone membranes during ultrafiltration of palm oil mill effluent

  • Said, Muhammad (Department of Chemistry, Faculty of Mathematics and Science, University of Sriwijaya) ;
  • Mohammad, Abdul Wahab (Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, University Kebangsaan Malaysia) ;
  • Nor, Mohd Tusirin Mohd (Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, University Kebangsaan Malaysia) ;
  • Abdullah, Siti Rozaimah Sheikh (Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, University Kebangsaan Malaysia) ;
  • Hasan, Hassimi Abu (Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, University Kebangsaan Malaysia)
  • Received : 2014.04.19
  • Accepted : 2014.07.18
  • Published : 2014.07.25
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Abstract

Fouling is one of the critical factors associated with the application of membrane technology in treating palm oil mill effluent (POME), due to the presence of high concentration of solid organic matter, oil, and grease. In order to overcome this, chemical cleaning is needed to enhance the effectiveness of membranes for filtration. The potential use of sodium hydroxide (NaOH), sodium chloride (NaCl), hydrochloric acid (HCl), ethylenediaminetetraacetic acid (EDTA), and ultrapure water (UPW) as cleaning agents have been investigated in this study. It was found that sodium hydroxide is the most powerful cleaning agent, the optimum conditions that apply are as follows: 3% for the concentration of NaOH, $45^{\circ}C$ for temperature solution, 5 bar operating pressure, and solution pH 11.64. Overall, flux recovery reached 99.5%. SEM images demonstrated that the membrane surface after cleaning demonstrated similar performance to fresh membranes. This is indicative of the fact that NaOH solution is capable of removing almost all of the foulants from PES membranes.

Keywords

References

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